Added proper gitignores
Update dbhelper.class.php: filterkvarr()

This problem prevented me from performing a stock update using a fresh install of Magmi 0.7.19a on a fresh install of Magento CE 1.9.0.1. I created two simple products in Magento and tried to update their stock information them using Magmi. I created a two-column CSV ("sku" and "qty") and attempted to import it. I got the following errors:

1 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'use_config_manage_stock' cannot be null -
2 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'use_config_manage_stock' cannot be null - ERROR ON RECORD #1
3 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'use_config_manage_stock' cannot be null -
4 SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'use_config_manage_stock' cannot be null - ERROR ON RECORD #2

More details on this error are here: https://sourceforge.net/p/magmi/discussion/1228365/thread/8e722889/

I tracked the problem to filterkvarr(). If the $kvarr has values which are numerical 0's, the function changes their values to null. This is because var_dump(0 == '__NULL__'); // 0 == 0 -> true. However, var_dump(0 === '__NULL__'); // 0 !== '__NULL__' -> false. So I suggest this change. (See PHP's documentation on this: http://us1.php.net/operators.comparison).
Merge pull request #82 from PatrickCronin/master

Update dbhelper.class.php: filterkvarr()
Merge pull request #81 from electricjesus/master

improved gitignores
Update magmi_valueparser.php: parseValue()

I rely on the Value Replacer plugin to modify portions of my CSV input files. I found that it did not work on column values that contained double quotes. The Value Replacer's wiki page indicates that working with double quotes is a problem, but it's not clear that values in the CSV can also not have double quotes in them. This change will allow double quotes to be present in values worked on by the Value Replacer plugin without breaking it.
added support for -config command line setting to define custom .ini (&
associated profile subdir)
fixed option translation code (thx z3eman)
Better magma_valueparser.php for " and performance

Replaced preg_replace with str_replace for performance reasons.
Merge pull request #91 from PatrickCronin/master

Update magmi_valueparser.php: parseValue()